Glossary

Key SEO, GEO, and web development terms — explained clearly and concisely.

A/B Test

What is an A/B test? How to test page, ad, and content variants to improve conversion rates.

Above the Fold

Content visible without scrolling — the most valuable real estate on a page.

AI Overviews (Google)

What are AI Overviews? How Google generates AI-powered answers and how to appear in them.

Alt Text (Alternative Text)

What is alt text? Definition of image alternative text and its role in SEO and accessibility.

Anchor Text

What is anchor text? Definition of link anchor text and its role in link building and SEO.

Answer Engine

A search engine that provides direct answers (Perplexity, ChatGPT Search) instead of a list of links.

API

Application Programming Interface — an interface that enables communication between systems.

Attribution Model

A model for assigning conversions to channels: last click, first click, data-driven, linear.

AVIF

A modern image format — up to 50% smaller than WebP. Supported in Chrome, Firefox, Safari.

Backlink

What is a backlink? Definition, the importance of inbound links in SEO, and how to acquire them.

Bounce Rate

What is bounce rate? Definition, how to measure it, and how to reduce it.

Brand SERP — Search Results for Branded Queries

What is Brand SERP? How to control Google results for your company name and build brand credibility in search.

Broken Link Building

A strategy: find broken links on industry websites and propose your content as a replacement.

Buyer Persona

A fictional profile of an ideal customer: demographics, goals, challenges, purchasing decisions.

CAC

Customer Acquisition Cost — the cost of acquiring a customer. CAC < LTV = the business is profitable.

Call to Action (CTA)

A call to action: a button, link, or form encouraging the user to convert.

Canonical URL

What is a canonical URL? Definition of the canonical tag and its role in preventing content duplication.

CDN

Content Delivery Network — a network of servers delivering content from the geographically nearest point.

ChatGPT Search

ChatGPT's search feature that cites websites — a new traffic channel.

Churn Rate

Customer attrition rate — the percentage of customers who cancel within a given period.

Citability

What is citability? How to create content that AI readily cites in its responses.

Click Depth — Click Distance in Site Structure

What is click depth? How a page's distance from the homepage affects crawling and Google rankings.

Content Cluster

A content creation strategy: pillar page + cluster content + internal links = topical authority.

Content Gap Analysis

What is a content gap? Definition of content gap analysis and how to use it to build an SEO strategy.

Content Marketing

What is content marketing? Definition, formats, and its importance in SEO strategy.

Content Pruning

Removing or consolidating weak content — improves overall site quality and crawl budget.

Content Refresh

Updating existing articles with new data, links, and sections — faster results than creating new ones.

Content Velocity — Content Publication Pace

What is content velocity? How the pace of content publishing affects organic traffic growth and building topical authority.

Conversion

What is a conversion? Definition, types of conversions, and how to optimize conversion rate (CRO).

Core Web Vitals

What are Core Web Vitals? Definition of Google's three metrics measuring page speed, responsiveness, and visual stability.

CPC (Cost Per Click) — What It Is, Formula, 2026 Benchmarks

CPC (Cost Per Click) — definition, formula, average rates in Poland and worldwide. How to lower CPC in Google Ads and Meta Ads? 2026 industry benchmarks.

CPL (Cost Per Lead) — cost of acquiring a lead

What is CPL? How to calculate the cost of acquiring a lead and what are the average CPL rates across industries.

Crawl Budget

What is crawl budget? Definition and its impact on how Google indexes your site.

Crawlability

What is crawlability? How to ensure that search engines can find and index your website.

Crawling

The process of scanning web pages by search engine bots (Googlebot) to discover and index content.

CRO

Conversion Rate Optimization — systematic optimization of website conversions through A/B testing, UX, and copywriting.

CTR (Click-Through Rate)

What is CTR? Definition of click-through rate and its significance in SEO and advertising.

Customer journey — the customer's path

What is a customer journey? How to map the customer's path from awareness to purchase and optimize every stage.

Data-driven marketing

What is data-driven marketing? How to make marketing decisions based on data instead of intuition.

Digital PR

Acquiring links and brand mentions through media coverage: expert articles, data, research, and infographics.

Domain Authority

A Moz metric (0-100) estimating domain strength based on its link profile.

Domain name

What is a domain name? Definition, types of domains, and their impact on SEO and credibility.

Domain Rating (DR)

What is Domain Rating? Definition of this domain authority metric and its significance in SEO.

Duplicate content

What is duplicate content? Definition, causes, and how to avoid duplicated content in SEO.

Dwell time — what it is and how it affects SEO

What is dwell time? How time spent on a page affects Google rankings and how to increase it.

E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness)

What is E-E-A-T? How to build expertise and trustworthiness signals for Google and AI.

Edge Computing

Processing data close to the user (on edge servers) for minimal latency.

Email Marketing

Marketing through email: newsletters, sequences, and campaigns. The highest ROI of all marketing channels.

Entity SEO

What is entity SEO? How to build your brand identity in Google Knowledge Graph and AI.

Facebook Pixel

Facebook's tracking script installed on your website — it measures conversions and enables remarketing.

Featured snippets

What are featured snippets? Definition of Google's highlighted fragments and how to optimize content to earn them.

First-party data — your own company data

What is first-party data? Why owned data has become the foundation of marketing after cookie deprecation and how to collect it.

Funnel

Conversion funnel: the user's journey from first contact to purchase or conversion.

GEO (Generative Engine Optimization)

What is GEO? Definition of optimization for AI-powered generative engines — ChatGPT, Gemini, Perplexity.

GEO Optimization

Generative Engine Optimization — optimizing content for AI engines (ChatGPT, Perplexity, Google AI Overviews).

Google Ads

Google's advertising platform — ads in search results, YouTube, and the Display Network.

Google Analytics 4

The latest version of Google Analytics — event-based tracking, cross-platform measurement, and privacy-first architecture.

Google Business Profile

A business listing on Google — displayed in Maps and local search results. The foundation of local SEO.

Google Search Console

A free Google tool for monitoring website visibility in search results, indexing status, and errors.

Google Tag Manager

A tag management system for deploying and managing tracking scripts on a website without editing code.

Guest Posting

Publishing articles on external websites in exchange for a backlink — a classic link building tactic.

Headless CMS — Definition and Use Cases

What is a Headless CMS? How headless architecture is changing the approach to content management on websites.

Heat Map

A visual representation showing where users click, scroll, and focus their attention on a page.

Hreflang

An HTML attribute that tells search engines which language version of a page to serve — essential for multilingual SEO.

HTTPS

What is HTTPS? Definition of the secure connection protocol and its impact on SEO.

Image SEO

Image optimization for search: alt text, file names, WebP/AVIF, lazy loading, and image sitemaps.

Impression Share

What is impression share? How to measure and increase your share of impressions in Google Ads campaigns.

Index Bloat — Excessive Page Indexation

What is index bloat? How an excess of low-quality pages in Google's index weakens site visibility and how to prevent it.

Indexing

What is website indexing? How Google indexes pages and why it is crucial for SEO.

Indexing API

A Google API that enables instant submission of new or updated pages for indexing.

Internal Linking

A strategy of connecting pages within a website using links — builds topical authority and facilitates crawling.

JavaScript SEO

What is JavaScript SEO? Challenges and solutions for JavaScript-based websites (React, Next.js, Angular).

Keyword Difficulty

What is keyword difficulty (KD)? How to assess ranking difficulty for a keyword and choose keywords with a chance of reaching the TOP 10.

Keyword Research

What is keyword research? Definition of the keyword research process and its role in SEO strategy.

Keywords

What are keywords? Definition, types, and the role of keywords in SEO and content marketing strategy.

Knowledge Graph

What is Google's Knowledge Graph? How to build your brand's presence in the knowledge graph.

KPI

Key Performance Indicator — a metric that measures the success of marketing activities.

Landing Page

What is a landing page? Elements of an effective landing page and its role in marketing.

Lazy Loading

Loading images and content only when the user scrolls to them — resulting in a faster initial page load.

Lead Magnet

Valuable content (e-book, checklist, webinar) offered in exchange for an email address — building a lead database.

Link Building

What is link building? Definition, strategies, and the importance of building links in SEO.

Link Equity — What It Is and How Authority Flows

What is link equity (link juice)? How links pass authority between pages and how to leverage it in SEO.

LLM Optimization

Optimizing content for large language models — citability, authority, and structure.

llms.txt

What is llms.txt? An information file for AI models — how to create one and why it matters for GEO.

Local SEO

Local search optimization: Google Business Profile, local keywords, NAP consistency, and reviews.

Log File Analysis

Server log analysis revealing how Googlebot crawls your site — which pages it visits and how frequently.

Long-Tail Keyword

What are long-tail keywords? Definition and their strategic importance in SEO.

LTV

Lifetime Value — the total revenue a customer generates over the entire duration of the relationship. Essential for calculating acquisition budgets.

Marketing Automation

Automation of marketing processes: email sequences, lead scoring, and personalization.

Meta Tags

What are meta tags? Definition, types, and the importance of meta tags in SEO — title, description, robots.

Mobile-First Index

Google indexes and ranks pages based on their mobile version — mobile-first has been the standard since 2021.

MRR

Monthly Recurring Revenue — the predictable monthly revenue stream. A key SaaS metric.

NAP Consistency

Consistency of business Name, Address, and Phone number across the internet — critical for local SEO.

Next.js

A React framework for building websites and web applications: SSR, SSG, ISR, App Router. ARDURA Lab's standard.

Nofollow

What is the nofollow attribute? Definition, when to use rel=nofollow, and its impact on SEO.

Off-Page SEO

What is off-page SEO? Definition and strategies for building domain authority outside your website.

On-Page SEO

What is on-page SEO? Definition and key elements of content and code optimization on your website.

Orphan Page — what is an orphan page

What is an orphan page? How pages without internal links affect SEO and how to fix them.

Page Authority

What is Page Authority (PA)? How Moz's metric evaluates the strength of a single page and how it differs from Domain Authority.

Page Experience

Google's UX signals: Core Web Vitals, HTTPS, mobile-friendliness, and no intrusive interstitials.

PageSpeed

What is PageSpeed? How to measure and improve page loading speed for SEO and UX.

Pagination SEO

Optimization of paginated pages (product listings, blogs) — rel=next/prev, load more, infinite scroll.

Passage Ranking

Google can rank a specific passage of a page for a query, even if the overall page covers a different topic.

Perplexity SEO

Optimization for Perplexity.ai — an AI-powered search engine that cites sources.

Pillar Page

A comprehensive topic page (3,000+ words) that links to detailed articles within a content cluster.

PPC

Pay Per Click — an advertising model where you pay for each click. Google Ads, Facebook Ads.

Programmatic SEO — definition and use cases

What is programmatic SEO? How to automatically create hundreds of optimized pages targeting long-tail keywords and scale organic traffic.

PWA (Progressive Web App)

What is a PWA? How progressive web apps combine the advantages of websites and native applications.

RAG (Retrieval-Augmented Generation)

What is RAG? How the retrieval and answer generation mechanism works in AI.

React

A JavaScript library for building user interfaces. The base technology behind Next.js.

Redirect 301

What is a 301 redirect? Definition of a permanent redirect and when to use it in SEO.

Referring Domains

The number of unique domains linking to your website — a key link building metric.

Remarketing

Displaying ads to people who have already visited your website — higher conversion, lower CPC.

Rendering

The process of executing JavaScript by a browser or bot — critical for SPA and Next.js sites.

Responsive Design

What is responsive design? Definition of responsive web design and its importance for SEO and UX.

Rich Snippets

What are rich snippets? Definition of enhanced search results and how to obtain them with structured data.

ROAS (Return on Ad Spend)

What is ROAS? How to calculate and optimize return on advertising spend.

Robots.txt

What is robots.txt? How to properly configure the robots.txt file for SEO and AI crawlers.

ROI

Return on Investment — the return on an investment. In marketing: channel revenue / channel cost.

SaaS SEO — positioning software products

What is SaaS SEO? Content-led growth strategy, comparison keywords, and product-led SEO for software companies.

Schema.org (Structured Data)

What is Schema.org? Definition of structured data and its impact on SEO and search results.

Search Intent

What is search intent? Definition of search intent and why it is critical for SEO and content marketing.

SEM

Search Engine Marketing — marketing in search engines encompassing SEO (organic) and PPC (paid).

Semantic SEO

Content optimization focused on meaning and context, not just keywords — entities, topical coverage.

SEO (Search Engine Optimization)

What is SEO? Definition, key elements, and the importance of search engine optimization.

SERP (Search Engine Results Page)

What is a SERP? Elements of Google's search results page and how to stand out on it.

Server-Side Tracking

Server-side conversion tracking instead of browser-based — bypasses ad blockers.

SGEO — Search Generative Experience Optimization

What is SGEO? How to optimize content for AI-generated answers in Google SGE, ChatGPT Search, and Perplexity.

Sitemap XML

What is an XML sitemap? How to create a site map and submit it to Google.

Skyscraper Technique

A strategy: find the best content on a given topic, create something better, and promote it. Brian Dean / Backlinko.

Social Media Marketing

What is social media marketing? Strategies, platforms, and metrics for social media marketing for businesses.

Social Proof

Social proof: reviews, case studies, client logos, counters — building trust.

Source Authority

Source authority in the eyes of AI — citations, experts, data, E-E-A-T.

SSL/TLS Certificate

What is an SSL certificate? Definition, types of certificates, and why SSL is critical for SEO.

Static Site Generation (SSG) — Definition and Use Cases

What is Static Site Generation? How generating static pages affects performance, SEO, and security.

Structured Data

Structured data (JSON-LD, Microdata) that helps search engines understand page content and display rich snippets.

Tailwind CSS

A utility-first CSS framework — fast styling without writing custom CSS. A standard in Next.js projects.

Technical SEO

Technical website optimization: speed, crawlability, indexing, structured data, mobile.

Thin Content — Low-Quality Content in SEO

What is thin content? How low-quality content hurts Google rankings and how to identify and fix it.

TOFU / MOFU / BOFU

Funnel stages: Top of Funnel (awareness), Middle (consideration), Bottom (decision). Content matched to each stage.

Topical Authority

What is topical authority? How to build thematic authority and dominate SEO niches.

Toxic Links

Links from low-quality sites (PBNs, spam, link farms) that can harm SEO. Disavow tool.

TypeScript

A typed superset of JavaScript — fewer bugs, better documentation, the standard in enterprise projects.

URL Structure

URL address structure affecting SEO: short, descriptive, with a keyword, without parameters.

User Intent

The user's intent behind a query: informational, navigational, transactional, commercial.

UX (User Experience)

What is UX? Definition of user experience and its impact on SEO and conversion.

UX Writing — Writing Interface Copy

What is UX writing? How microcopy affects conversions, UX, and user experience on a website.

Video SEO

Video optimization: Schema.org VideoObject, thumbnails, transcripts, YouTube SEO.

Voice Search

What is voice search? Definition of voice search and how to optimize a website for voice queries.

WebP

Google's image format — 25–34% smaller than JPEG/PNG at the same quality.

Zero-Click Search

A Google query where the user gets an answer without clicking on a result (featured snippet, AI Overview).